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            <h1 style="text-align: center;"><big><big><big><a
 name=".pea_specifications"></a>What is PEA format, features, specs<br>
            </big></big></big></h1>
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                  <div> </div>
                  <ul>
                    <li>
                      <p><a href="#.pea_specs">WHAT ARE PEA FILES,
FORMAT
FEATURES AND SPECIFICATIONS</a></p>
                    </li>
                  </ul>
                  </td>
                  <td style="vertical-align: top; width: 128px;">
                  <h2><img
 title="PEA compression, archiving and encryption format"
 alt="PEA extension" src="file-format/archive-format.png"
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            <h2><big><big><big><a name=".pea_specs"></a></big></big></big><a
 href="#.pea_specifications"><big><big><big>What are PEA
files, format features and specifications</big></big></big><br>
            </a></h2>
            <div style="text-align: right;">
            <div style="text-align: center;"> </div>
            <div style="text-align: left;"><br>
            </div>
            <h3 style="text-align: center; font-style: italic;"><big>PEA
file
format specifications version 1.1</big></h3>
            </div>
            <br>
            <a name="what_is_pea_file"></a>Pea (.pea file extension),
acronym for
Pack, Encrypt, Authenticate, designs a file format focused on data
security, aiming to provide <span style="font-weight: bold;">archiving</span>,
            <span style="font-weight: bold;">compression </span>and
multi volume <a href="file-split.html"><span style="font-weight: bold;">file
split</span></a> (spanning) feature in a single passage,
along with
flexible schemes of<span style="font-weight: bold;"> </span>optional <a
 href="verify-checksum-hash.html"><span style="font-weight: bold;">integrity
check</span></a>
and <span style="font-weight: bold;">authenticated
encryption</span> (AES in EAX or HMAC mode, alternatively Twofish and
Serpent in EAX mode); PEA file format specifications are
released under
public domain.<br>
            <br>
            <a name="pea_file_compression"></a>Pea compression is
optional, at current level of implementation are
defined only following levels: PCOMPRESS0 (store only, no compression),
and PCOMPRESS1..3 based on deflate (reference zlib's compres/uncompres
algorithm code), respectively at compression level 3, 6 and 9.<br>
            <br>
            <div style="text-align: justify;">PEA format security model
acts
at 3 levels: objects (input files and folders sent to .pea archive),
volumes (output archive file that can be spanned to user defined size)
and streams (the actual output data stream that is formed by multiple
input files and can be written written to multiple output volumes);
each one of those levels can
be omitted as needed by the user.</div>
            <ul>
              <li>Object level integrity checking is performed to
detect errors with object level granularity on raw input data and all
associated data (name, size, attributes, date-time);</li>
              <ul>
                <li>Current implementation allows: <a
 name="pea_integrity_checking"></a>Checksum (Adler32,
CRC32, CRC64), Hash (MD5, SHA1, RIPEMD-160, SHA256, SHA512, Whirlpool,
, SHA3-256, SHA3-512)<br>
                </li>
              </ul>
            </ul>
            <ul>
              <li>Volume level integrity check is communication
oriented and allow to discard single corrupted volumes in order to
minimize, in case of error, the retransmission overhead;</li>
              <ul>
                <li>Current implementation allows same Checksum and
Hash algorithms featured by Object level check<br>
                </li>
              </ul>
            </ul>
            <ul>
              <li>Stream level check offers wide choice of
algorithms
up to authenticated encryption, protecting privacy and authenticity of
a group of objects sharing same security needs, including tags
generated by object level checks;</li>
              <ul>
                <li>Current implementation allows same Checksum and
Hash algorithms featured by Object and Volume levels, plus
Authenticated encryption schemes: <a
 name="pea_authenticated_encryption"></a>HMAC mode AES128, EAX mode
AES128,
AES256, Serpent128, Serpent256, Twofish128, Twofish 256.<br>
                </li>
              </ul>
            </ul>
Arbitrarily sized
volume
spanning allows the archive to be splitted in volumes of arbitrary
size, with the only constrain of volumes being at least 10 byte bigger
than volume control tag to allow passing (through archive's header)
minimum needed information to the extraction application.<br>
            <br>
PEA file format standard, as defined in version 1 revision 1
specification, can
store a single stream containing unlimited objects, each up to 2^64
byte
in size; current Pea executable supports 1.1 file format
specifications (practically, archives are memory and filesystem-limited
rather than format limited) and is featured starting from PeaZip 6.0.1
release, previous PeaZip releases supporting PEA 1.0 format revision.<br>
            <br>
PEA 2.0 file format specifications extend the concepts behind PEA 1.x
file format and can store an unlimited number of stream, but the format
is not actually supported by current Pea archiving utility.<br>
            <br>
            <a name="pea_format_features"></a>Here, a brief table
of
features and limitations applying to file format and to current
implementation:<br>
            <div style="margin-left: 80px; text-align: center;"><br>
            </div>
            <div style="text-align: center;"> </div>
            <table class="MsoNormalTable"
 style="border: medium none ; background: white none repeat scroll 0% 50%; -moz-background-clip: initial; -moz-background-origin: initial; -moz-background-inline-policy: initial; border-collapse: collapse; width: 800px; text-align: left; margin-left: auto; margin-right: auto;"
 border="1" cellpadding="0" cellspacing="0">
              <tbody>
                <tr>
                  <td
 style="border: 1pt solid windowtext; padding: 0cm 5.4pt; width: 149.4pt; background-color: rgb(224, 224, 192); font-weight: bold;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Feature</p>
                  </td>
                  <td
 style="border-style: solid solid solid none; border-width: 1pt 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt; background-color: rgb(224, 224, 192); font-weight: bold;"
 valign="top" width="252">
                  <p style="text-align: justify;" class="MsoNormal">PEA
file format </p>
                  </td>
                  <td
 style="border-style: solid solid solid none; border-width: 1pt 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt; background-color: rgb(224, 224, 192); font-weight: bold;"
 valign="top" width="252">
                  <p style="text-align: justify;" class="MsoNormal">Current
utility implementation</p>
                  </td>
                </tr>
                <tr>
                  <td colspan="3"
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; vertical-align: top; width: 527.4pt; background-color: rgb(255, 255, 240);">
                  <p style="text-align: center;" class="MsoNormal"
 align="center">Archive</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <h3>Maximum
PEA archive size</h3>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; vertical-align: top; width: 189pt;">
                  <p class="MsoNormal">PEA archive maximum size is
unlimited, nohigher limit is set by
the format design for maximum archive size, only filesystem size
limitations applies<br>
                  </p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">Maximum PEA archive size is
limited to 16 YB (yottabyte), up to 999999 volumes of
2^64-1
byte each.<br>
Please note under currently understanding using 128 bit block
encryption it would be safe not to
encrypt more than 2^64 byte with same key, better staying one or more
orders of magnitude below.</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Stream
number</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">1.1: single stream;</p>
                  <p class="MsoNormal">2.0 unlimited number of
streams;</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">Single stream (1.1 file
format)</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 527.4pt; background-color: rgb(255, 255, 240);"
 colspan="3" valign="top" width="703">
                  <p style="text-align: center;" class="MsoNormal"
 align="center">Output</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Security</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 378pt;"
 colspan="2" valign="top" width="504">
                  <p class="MsoNormal">Optional Authenticated
Encryption, at stream level only. HMAC mode: AES128, EAX mode:
AES 128 or 256bit, Serpent 128 / 256, Twofish 128 / 256.</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Integrity
check</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 378pt;"
 colspan="2" valign="top" width="504">
                  <p class="MsoNormal">AE tag (see security section) or
hash or checksum
at
stream level, plus hash or checksum for input objects, and for output
volumes.<br>
                  </p>
                  <p class="MsoNormal">Currently supported: Adler32,
CRC32, CRC64 checksum algorithms; MD5, SHA1, RIPEMD-160, SHA-2 and
SHA-3 families, and Whirlpool hash algorithms.<br>
                  </p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Error
correction</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 378pt;"
 colspan="2" valign="top" width="504">
                  <p class="MsoNormal">No scheme featured at current
level of development<br>
                  </p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Communication
recovery</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">Independent volume control
check
allow to identify corrupted volumes (first volume may be needed to know
volume check algorithm)</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">No specific tool
developed;
volume check is done during extraction and then, allowing to repeat
download only of corrupted volumes</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Data
recovery</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">Stream control tags allow
to
recognize correct streams, if better granularity is needed object
control tags allow to recognize correct objects; input object names and
POD trigger allow to identify objects and stream between the archive
data;</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">No specific tool developed
to
try error resistant data extraction, however object check errors are
reported to identify corrupted and non corrupted data if the extraction
is successful</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Support
for multi volume output</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 378pt;"
 colspan="2" valign="top" width="504">
                  <p class="MsoNormal">Native, requires a single
pass. Raw file spanning compatible with Unix split command, and
applications like HJSplit and 7-Zip.<br>
                  </p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Volume
number</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">1..unlimited</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">1..999999 (6 digit counter
string in
output
file name, after .pea file extension)</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Volume
size</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">Volume tag size +1..
unlimited;
first volume must contain at least 10 byte of data to allow parsing of
the archive header, to allow unpacking application to&nbsp; calculate
volume tag size</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">Volume tag size +1..
2^64-1
(qword variable) ; first volume must contain at least 10 byte of data</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Compression</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 378pt;"
 colspan="2" valign="top" width="504">
                  <p class="MsoNormal">Native, requires single
pass;
schemes:</p>
                  <p class="MsoNormal">PCOMPRESS0: no
compression;
PCOMPRESS1..3 based on deflate using zlib's compres/uncompres, level 3,
6 and 9 respectively&nbsp;</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Solid
archive</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 378pt;"
 colspan="2" valign="top" width="504">
                  <p class="MsoNormal">Not implemented
compression
modes featuring the possibility of creating solid archive</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 527.4pt; background-color: rgb(255, 255, 240);"
 colspan="3" valign="top" width="703">
                  <p style="text-align: center;" class="MsoNormal"
 align="center">Input</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Input
types</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">1.1: files and dirs;</p>
                  <p class="MsoNormal">2.0: files, dirs, metadata
stored as messages triggers</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">Files and dirs (1.1)</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <h3>Maximum number of files/ objects in a PEA archive<br>
                  </h3>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">1..unlimited, theoretically a
PEA archive can accept an unlimied number of input files</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">Host system memory limited
(input object list is stored in a dynamic array of strings)</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <h3>Maximum size of input file for PEA archive<br>
                  </h3>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">0..2^64-1 16 EB maximum size for
each input file<br>
                  </p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">0..2^64-1 16 EB maximum size,
likely limited by underlying filesystem technology<br>
                  </p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Input
object qualified name size (size 0 mean that archive object is a
trigger, no input object mapped to the archive object)</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">1..2^16-1 64 KB of characters
under any encoding<br>
                  </p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">1..32K (exceeding needs,
longer
values are considered errors)</p>
                  </td>
                </tr>
                <tr>
                  <td
 style="border-style: none solid solid; border-width: medium 1pt 1pt; padding: 0cm 5.4pt; width: 149.4pt;"
 valign="top" width="199">
                  <p style="text-align: justify;" class="MsoNormal">Metadata</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">Objects attributes and
last
modification time, optionally comments and any kind of meta content
using messages</p>
                  </td>
                  <td
 style="border-style: none solid solid none; border-width: medium 1pt 1pt medium; padding: 0cm 5.4pt; width: 189pt;"
 valign="top" width="252">
                  <p class="MsoNormal">Save object attributes and
object last modification time. Restore only object attributes (on
Microsoft Windows), nothing on *x</p>
                  </td>
                </tr>
              </tbody>
            </table>
            <div style="text-align: center;"> </div>
            <br>
            <a name="pea_format_specifications"></a>For a more complete
explanation and discussion of the pea format
specifications please see the documentation about <a
 href="pea_help.pdf">Pea archive format</a>
design (.pdf).<br>
            <big><span style="font-weight: bold;"></span></big><span
 style="font-weight: bold;"></span>
            <table style="width: 100%; text-align: left;" border="0"
 cellpadding="24" cellspacing="0">
              <tbody>
                <tr>
                  <td
 style="vertical-align: top; text-align: right; width: 128px;"><span
 style="font-weight: bold;"><img
 title="PEA secure archive format features"
 alt="secure file format AES EAX authenticated encryption"
 src="file-format/quotes.png" style="width: 32px; height: 32px;"></span></td>
                  <td style="vertical-align: top; font-style: italic;"><big>When
it is recommended to use PEA format: it is a good choice for reasonably
fast archiving and backup, when
it is needed to guarantee confidentiality (data cannot be accessed
without password), integrity, and autenticity - data can only be
modified by recipient knowing the password, as data is subject to
password-dependent, cryptographically strong verification.</big></td>
                  <td style="vertical-align: bottom; width: 128px;">
                  <h3><img title="PEA secure file format specs"
 alt="secure archive format aes encryption"
 src="file-format/quotes-inverse.png" style="width: 32px; height: 32px;"></h3>
                  </td>
                </tr>
              </tbody>
            </table>
            <span style="font-weight: bold;"></span>
            <table
 style="background-color: rgb(78, 126, 230); width: 100%; text-align: left;"
 border="0" cellpadding="0" cellspacing="1">
              <tbody>
                <tr style="color: rgb(245, 245, 245);">
                  <td colspan="1" rowspan="1"
 style="vertical-align: top; background-color: rgb(88, 136, 240);">
                  <table style="width: 100%; text-align: left;"
 border="0" cellpadding="0" cellspacing="0">
                    <tbody>
                      <tr>
                        <td style="vertical-align: top; width: 24px;">&nbsp;&nbsp;
                        <br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;">&nbsp;&nbsp;
                        <br>
                        </td>
                      </tr>
                      <tr>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td
 style="vertical-align: top; color: rgb(245, 245, 245); width: 430px;">
                        <table style="width: 100%; text-align: left;"
 border="0" cellpadding="0" cellspacing="0">
                          <tbody>
                            <tr>
                              <td
 style="width: 50%; color: rgb(245, 245, 245); vertical-align: middle;">
                              <h3><big><big><big><big><big>.PEA</big></big></big></big></big></h3>
                              </td>
                              <td
 style="width: 50%; color: rgb(245, 245, 245); vertical-align: middle;">Author:
Giorgio Tani, 2006<br>
no maximum number of input files<br>
no maximum archive size<br>
2^64 bytes max size for each input file<br>
                              </td>
                            </tr>
                          </tbody>
                        </table>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td
 style="vertical-align: top; color: rgb(245, 245, 245); width: 430px;"><big>SPEED
                        <img alt="secure AES encrypted file type"
 title="pea compression speed" src="zip-files/star3.png"
 style="width: 80px; height: 16px;"></big><br>
Pea format features average speed, due lightweight, quick Deflate-based
compression algorithm,
and efficient encryption
and hashing algorithms.<br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                      </tr>
                      <tr>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                      </tr>
                      <tr>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td
 style="vertical-align: top; color: rgb(245, 245, 245); width: 430px;"><big>COMPRESSION
RATIO <img alt="pea secure archive specifications"
 title="pea compression performances" src="zip-files/star2.png"
 style="width: 80px; height: 16px;"></big><br>
Pea format features moderate compression, due to fast
Deflate-based compression, comparable with compression ratios of
GZ and classic ZIP format, making it suitable to archive or backup
large quantities of data in reasonable time.<br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td
 style="vertical-align: top; color: rgb(245, 245, 245); width: 430px;"><big>ADVANCED
OPTIONS <img alt="pea secure format specs" title="pea format options"
 src="zip-files/star3.png" style="width: 80px; height: 16px;"></big><br>
Pea format lacks some features of competing formats, but
offers advanced security focused characteristics, as AES-based
authenticated encryption (can be optionally be replaced by Serpent or
Twofish EAX mode authenticated encryption).<br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                      </tr>
                      <tr>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 430px;"><br>
                        </td>
                        <td style="vertical-align: top; width: 24px;"><br>
                        </td>
                      </tr>
                    </tbody>
                  </table>
                  </td>
                </tr>
              </tbody>
            </table>
            <br>
            </td>
          </tr>
        </tbody>
      </table>
      <table
 style="background-color: rgb(240, 240, 240); width: 960px; text-align: left;"
 border="0" cellpadding="24" cellspacing="0">
        <tbody>
          <tr align="left">
            <td
 style="background-color: rgb(255, 255, 255); vertical-align: top;">
            <table style="text-align: left;" border="0" cellpadding="6"
 cellspacing="0">
              <tbody>
                <tr>
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            <p><a href="peazip-help-faq.html">FAQ</a>
&gt; Archive file types &gt; PEA file format</p>
Topics and search suggetions about what is PEA file type (Pack Encrypt
Authenticate), PeaZip native format for secure archives, what are .pea
extension features and specifications, secure archive format supporting
AES EAX mode authenticated
encryption:
            <table style="width: 100%; text-align: left;" border="0"
 cellpadding="6" cellspacing="0">
              <tbody>
                <tr>
                  <td
 style="vertical-align: top; width: 25%; font-style: italic;"> what is
pea file format,<br>
what
are pea AES archives,<br>
maximum size of a pea archive,<br>
pea format features,<br>
pea file compression utility,<br>
encrypted archive format,<br>
                  </td>
                  <td
 style="vertical-align: top; width: 25%; font-style: italic;"> pea
format security specs,<br>
pea encryption specs,<br>
pea format characteristics,<br>
pea file archiving utility,<br>
two factor authentication,<br>
max number of files in pea archive,<br>
                  </td>
                  <td
 style="vertical-align: top; width: 25%; font-style: italic;"> PeaZip's
pea
specifications,<br>
pea compression algorithm specs,<br>
advantages of pea format,<br>
pea file archiver,<br>
max size limit for pea file,<br>
EAX authenticated encryption,<br>
                  </td>
                  <td
 style="vertical-align: top; width: 25%; font-style: italic;">faq
about .pea extension,<br>
max size of file in pea archive,<br>
pea AES Serpent Twofish specs,<br>
features of pea file format,<br>
pea file splitting utility,<br>
pea archiving format<br>
                  </td>
                </tr>
              </tbody>
            </table>
            </td>
          </tr>
        </tbody>
      </table>
      <table
 style="background-color: rgb(255, 255, 255); margin-left: auto; margin-right: auto; width: 960px; text-align: left;"
 border="0" cellpadding="24" cellspacing="0">
        <tbody>
          <tr>
            <td style="vertical-align: top;">Tag
Cloud<br>
            <span class="wrd free-rar2" id="pea-file-encryption"> <a
 href="pea-file-format.html">authenticated encryption</a></span> <span
 class="wrd free-rar3" id="aes-encryption"> <a
 href="pea-file-format.html">AES</a></span> <span class="wrd free-rar2"
 id="download-file-archiver"> <a href="index.html">download file
archiver</a></span> <span class="wrd free-rar4"
 id="pea-file-format-specifications"> <a href="pea-file-format.html">PEA</a></span>
            <span class="wrd free-rar2" id="pea-files"> <a
 href="pea-file-format.html">PEA files features</a></span> <span
 class="wrd free-rar3" id="serpent-crypto-algorithm"> <a
 href="pea-file-format.html">Serpent encryption</a></span> <span
 class="wrd free-rar2" id="twofish-cipher-algorithm"> <a
 href="pea-file-format.html">Twofish cipher</a></span><br>
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